Re: [VCARDDAV] Questions about vCard 4.0 (draft rev-11)

["Javier Godoy" <[e-mail]>]

On 06/22/2010 7:59 PM, Simon Perreault wrote:

> On 06/22/2010 05:16 PM, Javier Godoy wrote:
>> From section 2.3 of RFC 5234
>> ABNF strings are case insensitive .
>> To specify a rule that is case sensitive, specify the characters
>> individually.
>> For example:
>>   rulename    =  %d97 %d98 %d99
>>
>> So the ABNF above should be
>>
>> BEGIN-value = %d86 %d67 %d65 %d82 %d68; uppercase "VCARD"
>
> Wow! I didn't know that! Thanks!
>
> Ok so we have two options:
>
> 1. Leave the ABNF as is but state that the value is case insensitive.
> 2. Change the ABNF and state that the value is case sensitive.
>
> I think I would prefer 1.

Allowing values to be case insensitive may work for BEGIN:VCARD and END:VCARD.
I don't have preference between either approach.

About case sensitiviy for "T" and "Z", they are defined in section 3.4.3
"Characters used as designators" of ISO 8601:2004 as: «
In representations the following characters are used as designators:
   [Z] is used as UTC designator.
   [T] is used as time designator
»

It seems they are specified as uppercase (at least, there is no example with
lowercase designators), so in this case we should the ABNF.

utc-designator = "Z"
zone   = utc-designator / utc-offset

time-designator = "T"
date-time = date-noreduc  time-designator time-notrunc
timestamp = date-complete time-designator time-complete
date-and-or-time = date-time / date / time-designator time


Best Regards

Javier